<template>
  <div>
    <li v-for="obj in arr" :key="obj">
      {{obj}}
    </li>
    <button @click="btn">走一走，转一转</button>
  </div>
</template>

<script>
export default {
  data(){
    return {
       arr:['帅哥','美女','程序猿']
    }
  },
   methods: {
   btn(){
      this.arr.push(this.arr[0])

      this.arr.shift()
   }
   }
}
</script>

<style>

</style>
